Tripod.



Patented Dec'. 25, |900. P. H. REARDDN;

T R l P D D q A (Application led Sepa 20, 1899,)

i 2 She'etssheet l.

(No Modei.)

kmvemn om'.

" mammm Ze/MJXX Patented Dec. 25, |900.

P. H. REARDN.

TRIPD.

:Application tiled Sept. 20, 1899() 2 Sheets-Sheet 2.

(No Model.)

` UNITED STATES PATENT OFFICE.

PATRICK H. REARDON, OF SAN FRANCISCO, CALIFORNIA.

TRIPQD.

SPECIFICATION forming' part 0f LettelS Patent N0. 664,502, datedDecember 25, 1900.

' Application led September 20, 1899. Serial No. 731,075. (No model.) i

To all whom t may concern:

Beit known that I, PATRICK H. REARDON, a citizen of the United States,residing at San Francisco, in the county of San Francisco and Slate ofCalifornia,have invented certain new and useful Improvements in Tripods;and I do hereby declare the following to loe a full, clear, and exactdescription of the same.

My invention relates to a novel tripod for supportingr a rock-drill.

Heretofore difficulty has been experienced in this class of devices fromthe fact that no provision is made for adjustment between the tripod andthe drill. In other words, apart from the swing of the drill at itsattachment to the tripod other adjustment must be made by moving thetripod legs. In many instances this is impracticable, thus causinginconvenience and delay. Another objectionable feature in the devices atpresent in use isthat the drill attachment forms an integral portion ofthe tripod structure. Thus when this partis worn out or broken the wholedevice is inoperative and useless.

To overcome the stated objections and to provide a simple, cheap, andefficient device of the character mentioned is the object of thepresentinventiou. This is accomplished by the devices illustrated in theaccompanying drawings, in which- Figure l is a perspective View of thetripod. Fig. 2 is a front view of the upper portion of the tripod with acolumn-clamp for a rockdrill attached thereto. Fig. 3 is a transversesection of the upper portion of the tripod, showing a column-clamp drillattach ment in place thereon and a portion of the drill-back in place onthe projection. Fig. 4 is a plan view ofthe upper portion of the tripod,a portion being in section to more clearly illustrate it. Fig. 5 is afront elevation of the upper portion of the tripod. Fig. 6 is a sideelevation of the same.

Referring to the accompanying drawings, A and A, each consisting of acylindrical bar provided with a projecting arm a and d", respectively,andthe end ot one being preferably socketed in the other, as shown at a2in Figs. t and 5, form together the head of the tripod for the receptionof an ordinary column-clamp, such as is employed to attach a rock-drilltoaround standard or drillcolumn.

The outer end of A and A is provided with an integral boss a2 a3, onwhich is journaled a collar or cap B and B, respectively. These collarsor caps B and B are each provided with a transverse journal-box Z) andb', re spectively, for the reception of pivot-bolts C and C', onwhichare journaled legs D and D'. Between the arms a and a' is fitted aT-shaped head E, constituting the upper end ofthe tripod and formingwith the arms o. and a a hinged joint having a hinge-pin formed ot' thebolt a3, which passes through the arms a a' and the head E. A bolt Fpasses longitudinally through the bars A and A and the caps B and B',securing the whole firmly though mov-ably together. The caps or collarsB and B are each radially split, as shown at b2 in Fig. 6.

G is a column-clamp (shown in position in Figs. 2 and 3) provided withbolts gor other suitable means for securing it upon the cylindricaltripod-head and provided with Silitable means for attaching a rock-drillto the clamp, shown in the present instance as a locking boss orprojection H. One half of this projection H is movable to and from theother half by means of a bolt and nut I.

.I represents a portion of the drill-back provided with a socket for thereception of the locking projection H, Fig. 3.

In operation when it is desired to changea drill from the column orstandard and operate it upon a tripod the column-clamp is removed,withor withoutthe drill, and is placed upon the cylindrical head of thetripod, and the device is then ready for operation.

The cylindrical tripod-head is made slightly Wider than thecolumn-clamp, thereby permitting of side adjustment of the drill withoutdisarranging any other adjustment than the mere loosening of thecolumn-clamp upon the tripod-head.

In using this tripod I preferably use a column-clamp provided with aprojecting boss, as already described, and a rock-drill the shell orback .I of which is provided with a pocket adapted to receive theprojecting boss of the clamp, so that the drill may be hung securelythough loosely upon the projection H, and thus immediately liberate oneoperative, as all subsequent adjustments are Within the power of oneoperative, as shown in Fig. 3.

IOO

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a support for a rock-drill, the combination of a cylindrical headcomprising two parts A and AQ each provided With an integral arm, a leghinged between said arms, each of said parts A and A having at its outerend an integral boss, a cap adjustably secured to each of said bosses,and a leg hinged to each of said caps and movable at an angle to theplane of movement of the cap, and means for securing said legs,substantially as described.

2. In a support for a rock-drill, the combination of a two-partcylindrical head A, A',

each part having formed integrally therewith a lateral arm and a boss atits end, a split cap journaled on each boss, a bolt F passing throughsaid cylindrical head and caps, a leg having a head jonrnaled betweenthe ends of said lateral arms, a bolt for each of said split caps forclamping the same on its boss and extending at an angle to the bolt F,and a leg journaled on each of said capclamping 'bolts and adaptedthereby to be secured in adjusted positions, substantially as described.

PATRICK H. REARDON. Witnesses:

WM. A. HEWITT, A. W. STAUFER.

